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US 2014/0276433 A1Published application
Safety iv catheter assembly with seal
AssigneeB. Braun Melsungen AG
InventorKevin Woehr
Life of this patent
Estimating the term…
Abstract
Catheter assemblies are described having a catheter hub with a catheter tube and a needle hub with a needle projecting through the catheter tube. The catheter hub has at least two seals with at least one being a temporary seal that ends or terminates upon movement of a needle and/or a guard. Different needle guards are provided that can be seated differently within the catheter hub to seal against the elastic seal.
Claims21
A catheter assembly comprising:
- a catheter hub with a catheter tube having a tube end, said catheter hub comprising a body comprising an interior surface defining an interior cavity comprising a first inside diameter section distal of a second inside diameter section and wherein said first inside diameter section is larger in dimension than said second inside diameter section;
- a needle hub with a needle having a needle tip, a nominal needle diameter, and a needle shaft projecting through the catheter hub and the catheter tube such that the needle tip extends distally of the tube end in a ready position;
- an elastic seal held against a shoulder in the interior cavity of the catheter hub, said elastic seal comprising an outside diameter and an inside diameter and wherein said inside diameter being sufficiently larger than the nominal needle diameter so that the needle shaft does not come in contact with the inside diameter of the elastic seal in the ready position;
- a needle guard for covering the needle tip in a protective position located in the interior cavity of the catheter hub and in contact with the elastic seal;
- a temporary seal for limiting fluid flow formed at a point where the needle guard contacts the elastic seal.
2 more elements
A catheter assembly comprising:
- a catheter hub with a catheter tube having a tube end, said catheter hub comprising a body defining an interior cavity having an interior surface with an interior shoulder;
- a needle hub with a needle having a needle tip, a nominal needle diameter, and a needle shaft projecting through the catheter hub and the catheter tube such that the needle tip extends distally of the tube end in a ready position;
- an elastic seal held against the interior shoulder in the interior cavity of the catheter hub, said elastic seal comprising an outside diameter, an inside diameter, and a side surface located between the inside and outside diameters and wherein said inside diameter being sufficiently larger than the nominal needle diameter so that the needle shaft does not come in contact with the inside diameter of the elastic seal in the ready position;
- a needle guard for covering the needle tip in a protective position located in the interior cavity of the catheter hub, said needle guard comprising a distal wall having a distal opening and a distally facing surface in contact with the side surface of the elastic seal;
- a temporary seal for limiting fluid flow formed at a point where the needle guard contacts the side surface of the elastic seal.
2 more elements
A method for manufacturing a catheter assembly comprising:
- forming a catheter hub with a catheter tube having a tube end, said catheter hub comprising a body defining an interior cavity having an interior surface with an interior shoulder;
- forming a needle hub with a needle having a needle tip, a nominal needle diameter, and a needle shaft projecting through the catheter hub and the catheter tube such that the needle tip extends distally of the tube end in a ready position;
- placing an elastic seal in the interior cavity of the catheter hub and against the interior shoulder, said elastic seal comprising an outside diameter, an inside diameter, and a side surface located between the inside and outside diameters and wherein said inside diameter being sufficiently larger than the nominal needle diameter so that the needle shaft does not come in contact with the inside diameter of the elastic seal in the ready position;
- placing a needle guard for covering the needle tip in a protective position in the interior cavity of the catheter hub and in contact with the elastic seal;
- and
- forming a temporary seal for limiting fluid flow through the elastic seal at a point where the needle guard contacts the elastic seal.
3 more elements
Dependencies are inferred from the claim text.